terraform/command/format/diff_test.go

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package format
import (
"testing"
"github.com/hashicorp/terraform/addrs"
"github.com/hashicorp/terraform/configs/configschema"
"github.com/hashicorp/terraform/plans"
"github.com/mitchellh/colorstring"
"github.com/zclconf/go-cty/cty"
)
func TestResourceChange(t *testing.T) {
testCases := map[string]struct {
Action plans.Action
Mode addrs.ResourceMode
Before cty.Value
After cty.Value
Schema *configschema.Block
RequiredReplace cty.PathSet
ExpectedOutput string
}{
"creation": {
Action: plans.Create,
Mode: addrs.ManagedResourceMode,
Before: cty.NullVal(cty.EmptyObject),
After: cty.ObjectVal(map[string]cty.Value{
"id": cty.UnknownVal(cty.String),
}),
Schema: &configschema.Block{
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Computed: true},
},
},
RequiredReplace: cty.NewPathSet(),
ExpectedOutput: ` # test_instance.example will be created
+ resource "test_instance" "example" {
+ id = (known after apply)
}
`,
},
"deletion": {
Action: plans.Delete,
Mode: addrs.ManagedResourceMode,
Before: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("i-02ae66f368e8518a9"),
}),
After: cty.NullVal(cty.EmptyObject),
Schema: &configschema.Block{
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Computed: true},
},
},
RequiredReplace: cty.NewPathSet(),
ExpectedOutput: ` # test_instance.example will be destroyed
- resource "test_instance" "example" {
- id = "i-02ae66f368e8518a9" -> null
}
`,
},
"simple in-place update": {
Action: plans.Update,
Mode: addrs.ManagedResourceMode,
Before: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("i-02ae66f368e8518a9"),
"ami": cty.StringVal("ami-BEFORE"),
}),
After: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("i-02ae66f368e8518a9"),
"ami": cty.StringVal("ami-AFTER"),
}),
Schema: &configschema.Block{
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Optional: true, Computed: true},
"ami": {Type: cty.String, Optional: true},
},
},
RequiredReplace: cty.NewPathSet(),
ExpectedOutput: ` # test_instance.example will be updated in-place
~ resource "test_instance" "example" {
~ ami = "ami-BEFORE" -> "ami-AFTER"
id = "i-02ae66f368e8518a9"
}
`,
},
"simple force-new update": {
Action: plans.DeleteThenCreate,
Mode: addrs.ManagedResourceMode,
Before: cty.ObjectVal(map[string]cty.Value{
"id": cty.StringVal("i-02ae66f368e8518a9"),
"ami": cty.StringVal("ami-BEFORE"),
}),
After: cty.ObjectVal(map[string]cty.Value{
"id": cty.UnknownVal(cty.String),
"ami": cty.StringVal("ami-AFTER"),
}),
Schema: &configschema.Block{
Attributes: map[string]*configschema.Attribute{
"id": {Type: cty.String, Optional: true, Computed: true},
"ami": {Type: cty.String, Optional: true},
},
},
RequiredReplace: cty.NewPathSet(cty.Path{
cty.GetAttrStep{Name: "ami"},
}),
ExpectedOutput: ` # test_instance.example must be replaced
-/+ resource "test_instance" "example" {
~ ami = "ami-BEFORE" -> "ami-AFTER"
~ id = "i-02ae66f368e8518a9" -> (known after apply)
}
`,
},
}
color := &colorstring.Colorize{Colors: colorstring.DefaultColors, Disable: true}
for name, tc := range testCases {
t.Run(name, func(t *testing.T) {
beforeVal := tc.Before
before, err := plans.NewDynamicValue(beforeVal, beforeVal.Type())
if err != nil {
t.Fatal(err)
}
afterVal := tc.After
after, err := plans.NewDynamicValue(afterVal, afterVal.Type())
if err != nil {
t.Fatal(err)
}
change := &plans.ResourceInstanceChangeSrc{
Addr: addrs.Resource{
Mode: tc.Mode,
Type: "test_instance",
Name: "example",
}.Instance(addrs.NoKey).Absolute(addrs.RootModuleInstance),
ProviderAddr: addrs.ProviderConfig{Type: "test"}.Absolute(addrs.RootModuleInstance),
ChangeSrc: plans.ChangeSrc{
Action: tc.Action,
Before: before,
After: after,
},
RequiredReplace: tc.RequiredReplace,
}
output := ResourceChange(change, tc.Schema, color)
if output != tc.ExpectedOutput {
t.Fatalf("Unexpected diff.\nExpected:\n%s\nGiven:\n%s\n", tc.ExpectedOutput, output)
}
})
}
}